Allen, J. P. B., & Widdowson, H. G. English in social studies. Teacher´s edition.
Chicago Style (17th ed.) CitationAllen, J. P. B., and H. G. Widdowson. English in Social Studies. Teacher´s Edition.
MLA (8th ed.) CitationAllen, J. P. B., and H. G. Widdowson. English in Social Studies. Teacher´s Edition.
Warning: These citations may not always be 100% accurate.